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Where to put Selenium.stop() within testing framework?

October 1, 2008 - 10:49pm — Xuan Ngo

When using Selenium with a testing framework such as JUnit or TestNG, it is better to put selenium.stop() in the "closing method"(i.e. @After*) instead of in the test method itself. In this way, if tests failed, then the testing framework will be able to close the browser. Thus, you will save a lot of computer resources if your tests are opening and closing the browser thousands of times.

Code below show that TestNG will close the browser even the method failed.

/**
 * ShowCloseBrowser.java
 * Show that even though the test method fail, TestNG will close the browser.
 * @Author: Xuan Ngo
 */
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import static org.testng.Assert.assertTrue;
 
import com.thoughtworks.selenium.DefaultSelenium;
 
@Test(sequential=true)
public class ShowCloseBrowser
{
  private DefaultSelenium selenium = null;
 
  @BeforeMethod
  public void runBeforeEachTestMethod()
  {
    final String sServerHost  = "localhost";
    final int iServerPort     = 4444;
    final String sBrowserType = "*iexplore";
    final String sBaseUrl     = "http://www.google.ca/";
 
    this.selenium = new DefaultSelenium(sServerHost, iServerPort, sBrowserType, sBaseUrl);
    this.selenium.start(); // Start selenium.
 
    this.selenium.open("http://www.google.ca/index.html"); // Open the main google webpage.
  }
 
  @AfterMethod
  public void runAfterEachTestMethod()
  {
    this.selenium.stop(); // Close browswer.
  }
 
  @Test(description="Show that TestNG will close the browser even the test fail.")
  public void myFailedTest()
  {
    assertTrue(false, "Explicitly fail this test.");
  }
}